Handle partial dict setting

In Train cycle, we moved the definition of default values
to openstack_dashboard/defaults.py. The current code accesses
a dict member using []. It requires operators to define a dict
setting with a full member.

This commit allows to use dict-type settings with partial members.

A new function is introduced to retrieve a dict-type setting
considering default values defined in
{openstack_dashboard,horizon,openstack_auth}/defaults.py

Change-Id: I7ff0ad4bca698aef9c0eba370b0570200a14367a
Closes-Bug: #1843104

42 files changed, 226 insertions, 138 deletions

diff --git a/openstack_dashboard/api/cinder.py b/openstack_dashboard/api/cinder.py
index 76567560c..9d3154fa6 100644
--- a/openstack_dashboard/api/cinder.py
+++ b/openstack_dashboard/api/cinder.py
@@ -587,8 +587,7 @@ def volume_backup_supported(request):
     # backup is configured yet. This is a workaround until that
     # capability is available.
     # https://bugs.launchpad.net/cinder/+bug/1334856
-    cinder_config = settings.OPENSTACK_CINDER_FEATURES
-    return cinder_config['enable_backup']
+    return utils.get_dict_config('OPENSTACK_CINDER_FEATURES', 'enable_backup')
 
 
 @profiler.trace
diff --git a/openstack_dashboard/api/keystone.py b/openstack_dashboard/api/keystone.py
index 49ba098ef..cbf2da107 100644
--- a/openstack_dashboard/api/keystone.py
+++ b/openstack_dashboard/api/keystone.py
@@ -37,6 +37,7 @@ from horizon import exceptions
 from openstack_dashboard.api import base
 from openstack_dashboard.contrib.developer.profiler import api as profiler
 from openstack_dashboard import policy
+from openstack_dashboard.utils import settings as setting_utils
 
 
 LOG = logging.getLogger(__name__)
@@ -823,34 +824,35 @@ def delete_user_ec2_credentials(request, user_id, access_token):
 
 
 def keystone_can_edit_domain():
-    backend_settings = settings.OPENSTACK_KEYSTONE_BACKEND
-    can_edit_domain = backend_settings['can_edit_domain']
+    can_edit_domain = setting_utils.get_dict_config(
+        'OPENSTACK_KEYSTONE_BACKEND', 'can_edit_domain')
     multi_domain_support = settings.OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT
     return can_edit_domain and multi_domain_support
 
 
 def keystone_can_edit_user():
-    backend_settings = settings.OPENSTACK_KEYSTONE_BACKEND
-    return backend_settings['can_edit_user']
+    return setting_utils.get_dict_config(
+        'OPENSTACK_KEYSTONE_BACKEND', 'can_edit_user')
 
 
 def keystone_can_edit_project():
-    backend_settings = settings.OPENSTACK_KEYSTONE_BACKEND
-    return backend_settings['can_edit_project']
+    return setting_utils.get_dict_config(
+        'OPENSTACK_KEYSTONE_BACKEND', 'can_edit_project')
 
 
 def keystone_can_edit_group():
-    backend_settings = settings.OPENSTACK_KEYSTONE_BACKEND
-    return backend_settings['can_edit_group']
+    return setting_utils.get_dict_config(
+        'OPENSTACK_KEYSTONE_BACKEND', 'can_edit_group')
 
 
 def keystone_can_edit_role():
-    backend_settings = settings.OPENSTACK_KEYSTONE_BACKEND
-    return backend_settings['can_edit_role']
+    return setting_utils.get_dict_config(
+        'OPENSTACK_KEYSTONE_BACKEND', 'can_edit_role')
 
 
 def keystone_backend_name():
-    return settings.OPENSTACK_KEYSTONE_BACKEND['name'] or 'unknown'
+    return setting_utils.get_dict_config(
+        'OPENSTACK_KEYSTONE_BACKEND', 'name') or 'unknown'
 
 
 def get_version():
diff --git a/openstack_dashboard/api/neutron.py b/openstack_dashboard/api/neutron.py
index 3e14c8fd9..c51ef9e93 100644
--- a/openstack_dashboard/api/neutron.py
+++ b/openstack_dashboard/api/neutron.py
@@ -39,6 +39,7 @@ from openstack_dashboard.api import base
 from openstack_dashboard.api import nova
 from openstack_dashboard.contrib.developer.profiler import api as profiler
 from openstack_dashboard import policy
+from openstack_dashboard.utils import settings as setting_utils
 
 # Python 3.8 removes the ability to import the abstract base classes from
 # 'collections', but 'collections.abc' is not present in Python 2.7
@@ -799,8 +800,8 @@ class FloatingIpManager(object):
 
     def is_supported(self):
         """Returns True if floating IP feature is supported."""
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
-        return network_config['enable_router']
+        return setting_utils.get_dict_config(
+            'OPENSTACK_NEUTRON_NETWORK', 'enable_router')
 
 
 def get_ipver_str(ip_version):
@@ -1841,11 +1842,12 @@ def is_extension_supported(request, extension_alias):
 # values are pre-defined now, so 'default' argument is meaningless
 # in most cases.
 def is_enabled_by_config(name, default=True):
-    network_config = settings.OPENSTACK_NEUTRON_NETWORK
-    # NOTE(amotoki): This function is used by horizon plugins
-    # via is_service_enabled() function, so we need to keep .get()
-    # rather than [] dict operator.
-    return network_config.get(name, default)
+    try:
+        return setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK', name)
+    except KeyError:
+        # No default value is defined.
+        # This is a fallback logic for horizon plugins.
+        return default
 
 
 # TODO(amotoki): Clean up 'default' parameter because the default
@@ -1879,7 +1881,6 @@ FEATURE_MAP = {
         'extension': 'dvr',
         'config': {
             'name': 'enable_distributed_router',
-            'default': False,
         },
         'policies': {
             'get': 'get_router:distributed',
@@ -1889,8 +1890,9 @@ FEATURE_MAP = {
     },
     'l3-ha': {
         'extension': 'l3-ha',
-        'config': {'name': 'enable_ha_router',
-                   'default': False},
+        'config': {
+            'name': 'enable_ha_router',
+        },
         'policies': {
             'get': 'get_router:ha',
             'create': 'create_router:ha',
@@ -1921,7 +1923,6 @@ def get_feature_permission(request, feature, operation=None):
         defined in FEATURE_MAP[feature]['policies']
         It must be specified if FEATURE_MAP[feature] has 'policies'.
     """
-    network_config = settings.OPENSTACK_NEUTRON_NETWORK
     feature_info = FEATURE_MAP.get(feature)
     if not feature_info:
         raise ValueError("The requested feature '%(feature)s' is unknown. "
@@ -1931,10 +1932,8 @@ def get_feature_permission(request, feature, operation=None):
     # Check dashboard settings
     feature_config = feature_info.get('config')
     if feature_config:
-        # TODO(amotoki): Drop 'default' from FEATURE_MAP as it will be
-        # meaningless once all default settings are pre-defined.
-        if not network_config.get(feature_config['name'],
-                                  feature_config['default']):
+        if not setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                             feature_config['name']):
             return False
 
     # Check policy
diff --git a/openstack_dashboard/api/nova.py b/openstack_dashboard/api/nova.py
index 54e6518e9..55efd6745 100644
--- a/openstack_dashboard/api/nova.py
+++ b/openstack_dashboard/api/nova.py
@@ -1036,8 +1036,8 @@ def extension_supported(extension_name, request):
 
 @profiler.trace
 def can_set_server_password():
-    features = settings.OPENSTACK_HYPERVISOR_FEATURES
-    return features['can_set_password']
+    return utils.get_dict_config('OPENSTACK_HYPERVISOR_FEATURES',
+                                 'can_set_password')
 
 
 @profiler.trace
@@ -1049,16 +1049,16 @@ def instance_action_list(request, instance_id):
 @profiler.trace
 def can_set_mount_point():
     """Return the Hypervisor's capability of setting mount points."""
-    hypervisor_features = settings.OPENSTACK_HYPERVISOR_FEATURES
-    return hypervisor_features["can_set_mount_point"]
+    return utils.get_dict_config('OPENSTACK_HYPERVISOR_FEATURES',
+                                 'can_set_mount_point')
 
 
 @profiler.trace
 def requires_keypair():
-    features = settings.OPENSTACK_HYPERVISOR_FEATURES
-    return features['requires_keypair']
+    return utils.get_dict_config('OPENSTACK_HYPERVISOR_FEATURES',
+                                 'requires_keypair')
 
 
 def can_set_quotas():
-    features = settings.OPENSTACK_HYPERVISOR_FEATURES
-    return features['enable_quotas']
+    return utils.get_dict_config('OPENSTACK_HYPERVISOR_FEATURES',
+                                 'enable_quotas')
diff --git a/openstack_dashboard/contrib/developer/profiler/api.py b/openstack_dashboard/contrib/developer/profiler/api.py
index 99482362b..9c49754f6 100644
--- a/openstack_dashboard/contrib/developer/profiler/api.py
+++ b/openstack_dashboard/contrib/developer/profiler/api.py
@@ -25,9 +25,10 @@ from osprofiler import web
 import six
 from six.moves.urllib.parse import urlparse
 
+from horizon.utils import settings as horizon_settings
+
 
 ROOT_HEADER = 'PARENT_VIEW_TRACE_ID'
-PROFILER_SETTINGS = settings.OPENSTACK_PROFILER
 
 
 def init_notifier(connection_str, host="localhost"):
@@ -71,7 +72,8 @@ def _get_engine_kwargs(request, connection_str):
 
 
 def _get_engine(request):
-    connection_str = PROFILER_SETTINGS['receiver_connection_string']
+    connection_str = horizon_settings.get_dict_config(
+        'OPENSTACK_PROFILER', 'receiver_connection_string')
     kwargs = _get_engine_kwargs(request, connection_str)
     return profiler_get_driver(connection_str, **kwargs)
 
@@ -124,7 +126,7 @@ def update_trace_headers(keys, **kwargs):
                        web.X_TRACE_HMAC: trace_data[1]})
 
 
-if not PROFILER_SETTINGS['enabled']:
+if not horizon_settings.get_dict_config('OPENSTACK_PROFILER', 'enabled'):
     def trace(function):
         return function
 else:
diff --git a/openstack_dashboard/contrib/developer/profiler/middleware.py b/openstack_dashboard/contrib/developer/profiler/middleware.py
index 3ee4df613..0baaacda8 100644
--- a/openstack_dashboard/contrib/developer/profiler/middleware.py
+++ b/openstack_dashboard/contrib/developer/profiler/middleware.py
@@ -24,13 +24,14 @@ from osprofiler import web
 import six
 
 from horizon import messages
+from horizon.utils import settings as horizon_settings
 from openstack_dashboard.contrib.developer.profiler import api
 
 _REQUIRED_KEYS = ("base_id", "hmac_key")
 _OPTIONAL_KEYS = ("parent_id",)
 
-PROFILER_CONF = settings.OPENSTACK_PROFILER
-PROFILER_ENABLED = PROFILER_CONF['enabled']
+PROFILER_ENABLED = horizon_settings.get_dict_config(
+    'OPENSTACK_PROFILER', 'enabled')
 
 
 class ProfilerClientMiddleware(object):
@@ -60,7 +61,8 @@ class ProfilerClientMiddleware(object):
             return None
 
         if 'profile_page' in request.COOKIES:
-            hmac_key = PROFILER_CONF['keys'][0]
+            hmac_key = horizon_settings.get_dict_config(
+                'OPENSTACK_PROFILER', 'keys')[0]
             profiler.init(hmac_key)
             for hdr_key, hdr_value in web.get_trace_id_headers().items():
                 request.META[hdr_key] = hdr_value
@@ -69,11 +71,14 @@ class ProfilerClientMiddleware(object):
 
 class ProfilerMiddleware(object):
     def __init__(self, get_response):
-        self.name = PROFILER_CONF['facility_name']
-        self.hmac_keys = PROFILER_CONF['keys']
+        self.name = horizon_settings.get_dict_config(
+            'OPENSTACK_PROFILER', 'facility_name')
+        self.hmac_keys = horizon_settings.get_dict_config(
+            'OPENSTACK_PROFILER', 'keys')
         self.get_response = get_response
         if PROFILER_ENABLED:
-            api.init_notifier(PROFILER_CONF['notifier_connection_string'])
+            api.init_notifier(horizon_settings.get_dict_config(
+                'OPENSTACK_PROFILER', 'notifier_connection_string'))
         else:
             raise exceptions.MiddlewareNotUsed()
 
diff --git a/openstack_dashboard/contrib/developer/profiler/panel.py b/openstack_dashboard/contrib/developer/profiler/panel.py
index 8d8463225..5ea5ada65 100644
--- a/openstack_dashboard/contrib/developer/profiler/panel.py
+++ b/openstack_dashboard/contrib/developer/profiler/panel.py
@@ -13,13 +13,13 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
+from horizon.utils import settings as horizon_settings
 
 
-if settings.OPENSTACK_PROFILER['enabled']:
+if horizon_settings.get_dict_config('OPENSTACK_PROFILER', 'enabled'):
     class Profiler(horizon.Panel):
         name = _("OpenStack Profiler")
         slug = 'profiler'
diff --git a/openstack_dashboard/dashboards/admin/flavors/urls.py b/openstack_dashboard/dashboards/admin/flavors/urls.py
index 88ecfe6cf..882b8d718 100644
--- a/openstack_dashboard/dashboards/admin/flavors/urls.py
+++ b/openstack_dashboard/dashboards/admin/flavors/urls.py
@@ -16,15 +16,15 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
 
 from horizon.browsers.views import AngularIndexView
 from openstack_dashboard.dashboards.admin.flavors import views
+from openstack_dashboard.utils import settings as setting_utils
 
 
-if settings.ANGULAR_FEATURES['flavors_panel']:
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'flavors_panel'):
     title = _("Flavors")
     # New angular panel
     urlpatterns = [
diff --git a/openstack_dashboard/dashboards/admin/floating_ips/panel.py b/openstack_dashboard/dashboards/admin/floating_ips/panel.py
index 96405c97d..6cd6ecd58 100644
--- a/openstack_dashboard/dashboards/admin/floating_ips/panel.py
+++ b/openstack_dashboard/dashboards/admin/floating_ips/panel.py
@@ -13,11 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
 
+from openstack_dashboard.utils import settings as setting_utils
+
 
 class AdminFloatingIps(horizon.Panel):
     name = _("Floating IPs")
@@ -27,5 +28,5 @@ class AdminFloatingIps(horizon.Panel):
 
     @staticmethod
     def can_register():
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
-        return network_config['enable_router']
+        return setting_utils.get_dict_config(
+            'OPENSTACK_NEUTRON_NETWORK', 'enable_router')
diff --git a/openstack_dashboard/dashboards/admin/images/urls.py b/openstack_dashboard/dashboards/admin/images/urls.py
index 1464f37ba..368aec300 100644
--- a/openstack_dashboard/dashboards/admin/images/urls.py
+++ b/openstack_dashboard/dashboards/admin/images/urls.py
@@ -16,14 +16,14 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
 
 from horizon.browsers.views import AngularIndexView
 from openstack_dashboard.dashboards.admin.images import views
+from openstack_dashboard.utils import settings as setting_utils
 
-if settings.ANGULAR_FEATURES['images_panel']:
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'images_panel'):
     title = _("Images")
     # New angular images
     urlpatterns = [
diff --git a/openstack_dashboard/dashboards/admin/images/views.py b/openstack_dashboard/dashboards/admin/images/views.py
index d3aa16f71..41fd2f3cd 100644
--- a/openstack_dashboard/dashboards/admin/images/views.py
+++ b/openstack_dashboard/dashboards/admin/images/views.py
@@ -21,7 +21,6 @@ import logging
 from oslo_utils import units
 from six.moves import builtins
 
-from django.conf import settings
 from django.urls import reverse
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
@@ -33,6 +32,7 @@ from horizon import tables
 from openstack_dashboard import api
 from openstack_dashboard.dashboards.project.images.images import views
 from openstack_dashboard import policy
+from openstack_dashboard.utils import settings as setting_utils
 
 from openstack_dashboard.dashboards.admin.images import forms as project_forms
 from openstack_dashboard.dashboards.admin.images \
@@ -65,8 +65,8 @@ class IndexView(tables.DataTableView):
             return images
         filters = self.get_filters()
 
-        filter_first = settings.FILTER_DATA_FIRST
-        if (filter_first['admin.images'] and
+        if (setting_utils.get_dict_config('FILTER_DATA_FIRST',
+                                          'admin.images') and
                 len(filters) == len(self.DEFAULT_FILTERS)):
             self._prev = False
             self._more = False
diff --git a/openstack_dashboard/dashboards/admin/info/tables.py b/openstack_dashboard/dashboards/admin/info/tables.py
index eeb42da69..e4325e783 100644
--- a/openstack_dashboard/dashboards/admin/info/tables.py
+++ b/openstack_dashboard/dashboards/admin/info/tables.py
@@ -10,7 +10,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from django.conf import settings
 from django import template
 from django.template import defaultfilters as filters
 from django import urls
@@ -20,6 +19,7 @@ from django.utils.translation import ugettext_lazy as _
 from horizon import tables
 from horizon.utils import filters as utils_filters
 from openstack_dashboard import api
+from openstack_dashboard.utils import settings as setting_utils
 
 
 SERVICE_ENABLED = "enabled"
@@ -187,8 +187,8 @@ class NetworkL3AgentRoutersLinkAction(tables.LinkAction):
     verbose_name = _("View Routers")
 
     def allowed(self, request, datum):
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
-        if not network_config['enable_router']:
+        if not setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                             'enable_router'):
             return False
         # Determine whether this action is allowed for the current request.
         return datum.agent_type == "L3 agent"
diff --git a/openstack_dashboard/dashboards/admin/instances/views.py b/openstack_dashboard/dashboards/admin/instances/views.py
index f40a8e217..8ca198772 100644
--- a/openstack_dashboard/dashboards/admin/instances/views.py
+++ b/openstack_dashboard/dashboards/admin/instances/views.py
@@ -17,7 +17,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.urls import reverse
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
@@ -38,6 +37,7 @@ from openstack_dashboard.dashboards.project.instances import views
 from openstack_dashboard.dashboards.project.instances.workflows \
     import update_instance
 from openstack_dashboard.utils import futurist_utils
+from openstack_dashboard.utils import settings as setting_utils
 
 
 # re-use console from project.instances.views to make reflection work
@@ -142,8 +142,8 @@ class AdminIndexView(tables.PagedTableMixin, tables.DataTableView):
         # If filter_first is set and if there are not other filters
         # selected, then search criteria must be provided and return an empty
         # list
-        filter_first = settings.FILTER_DATA_FIRST
-        if (filter_first['admin.instances'] and
+        if (setting_utils.get_dict_config('FILTER_DATA_FIRST',
+                                          'admin.instances') and
                 len(search_opts) == len(default_search_opts)):
             self._needs_filter_first = True
             self._more = False
diff --git a/openstack_dashboard/dashboards/admin/networks/forms.py b/openstack_dashboard/dashboards/admin/networks/forms.py
index bace11e73..e3aab72be 100644
--- a/openstack_dashboard/dashboards/admin/networks/forms.py
+++ b/openstack_dashboard/dashboards/admin/networks/forms.py
@@ -14,7 +14,6 @@
 
 import logging
 
-from django.conf import settings
 from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
@@ -23,6 +22,7 @@ from horizon import forms
 from horizon import messages
 
 from openstack_dashboard import api
+from openstack_dashboard.utils import settings as setting_utils
 
 
 LOG = logging.getLogger(__name__)
@@ -171,14 +171,15 @@ class CreateNetwork(forms.SelfHandlingForm):
             is_extension_supported = False
 
         if is_extension_supported:
-            neutron_settings = settings.OPENSTACK_NEUTRON_NETWORK
             self.seg_id_range = SEGMENTATION_ID_RANGE.copy()
-            seg_id_range = neutron_settings['segmentation_id_range']
+            seg_id_range = setting_utils.get_dict_config(
+                'OPENSTACK_NEUTRON_NETWORK', 'segmentation_id_range')
             if seg_id_range:
                 self.seg_id_range.update(seg_id_range)
 
             self.provider_types = PROVIDER_TYPES.copy()
-            extra_provider_types = neutron_settings['extra_provider_types']
+            extra_provider_types = setting_utils.get_dict_config(
+                'OPENSTACK_NEUTRON_NETWORK', 'extra_provider_types')
             if extra_provider_types:
                 self.provider_types.update(extra_provider_types)
 
@@ -189,8 +190,8 @@ class CreateNetwork(forms.SelfHandlingForm):
                 net_type for net_type in self.provider_types
                 if self.provider_types[net_type]['require_physical_network']]
 
-            supported_provider_types = neutron_settings[
-                'supported_provider_types']
+            supported_provider_types = setting_utils.get_dict_config(
+                'OPENSTACK_NEUTRON_NETWORK', 'supported_provider_types')
             if supported_provider_types == ['*']:
                 supported_provider_types = DEFAULT_PROVIDER_TYPES
 
@@ -215,8 +216,8 @@ class CreateNetwork(forms.SelfHandlingForm):
                          for network_type in self.nettypes_with_seg_id)
             self.fields['segmentation_id'].widget.attrs.update(attrs)
 
-            physical_networks = settings.OPENSTACK_NEUTRON_NETWORK[
-                'physical_networks']
+            physical_networks = setting_utils.get_dict_config(
+                'OPENSTACK_NEUTRON_NETWORK', 'physical_networks')
 
             if physical_networks:
                 self.fields['physical_network'] = forms.ThemableChoiceField(
diff --git a/openstack_dashboard/dashboards/admin/networks/views.py b/openstack_dashboard/dashboards/admin/networks/views.py
index 03410a2a0..bf6f81f30 100644
--- a/openstack_dashboard/dashboards/admin/networks/views.py
+++ b/openstack_dashboard/dashboards/admin/networks/views.py
@@ -14,7 +14,6 @@
 
 from collections import OrderedDict
 
-from django.conf import settings
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
@@ -27,6 +26,7 @@ from openstack_dashboard import api
 from openstack_dashboard.dashboards.project.networks.tabs import OverviewTab
 from openstack_dashboard.dashboards.project.networks import views as user_views
 from openstack_dashboard.utils import filters
+from openstack_dashboard.utils import settings as setting_utils
 
 from openstack_dashboard.dashboards.admin.networks.agents import tabs \
     as agents_tabs
@@ -95,8 +95,9 @@ class IndexView(tables.DataTableView):
             # If filter_first is set and if there are not other filters
             # selected, then search criteria must be provided and return an
             # empty list
-            filter_first = settings.FILTER_DATA_FIRST
-            if filter_first['admin.networks'] and not search_opts:
+            if (setting_utils.get_dict_config('FILTER_DATA_FIRST',
+                                              'admin.networks') and
+                    not search_opts):
                 self._needs_filter_first = True
                 return []
             self._needs_filter_first = False
diff --git a/openstack_dashboard/dashboards/admin/rbac_policies/panel.py b/openstack_dashboard/dashboards/admin/rbac_policies/panel.py
index c9429fbf8..c23bdb073 100644
--- a/openstack_dashboard/dashboards/admin/rbac_policies/panel.py
+++ b/openstack_dashboard/dashboards/admin/rbac_policies/panel.py
@@ -12,12 +12,12 @@
 
 import logging
 
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
 
 from openstack_dashboard.api import neutron
+from openstack_dashboard.utils import settings as setting_utils
 
 LOG = logging.getLogger(__name__)
 
@@ -30,10 +30,10 @@ class RBACPolicies(horizon.Panel):
 
     def allowed(self, context):
         request = context['request']
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
         try:
             return (
-                network_config['enable_rbac_policy'] and
+                setting_utils.get_dict_config(
+                    'OPENSTACK_NEUTRON_NETWORK', 'enable_rbac_policy') and
                 neutron.is_extension_supported(request,
                                                extension_alias='rbac-policies')
             )
diff --git a/openstack_dashboard/dashboards/admin/routers/panel.py b/openstack_dashboard/dashboards/admin/routers/panel.py
index f11856e95..81bc0c2ba 100644
--- a/openstack_dashboard/dashboards/admin/routers/panel.py
+++ b/openstack_dashboard/dashboards/admin/routers/panel.py
@@ -12,11 +12,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
 
+from openstack_dashboard.utils import settings as setting_utils
+
 
 class Routers(horizon.Panel):
     name = _("Routers")
@@ -26,5 +27,5 @@ class Routers(horizon.Panel):
 
     @staticmethod
     def can_register():
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
-        return network_config['enable_router']
+        return setting_utils.get_dict_config(
+            'OPENSTACK_NEUTRON_NETWORK', 'enable_router')
diff --git a/openstack_dashboard/dashboards/admin/routers/views.py b/openstack_dashboard/dashboards/admin/routers/views.py
index 78e65fd8d..55c3ab3f4 100644
--- a/openstack_dashboard/dashboards/admin/routers/views.py
+++ b/openstack_dashboard/dashboards/admin/routers/views.py
@@ -16,7 +16,6 @@
 Views for managing Neutron Routers.
 """
 
-from django.conf import settings
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
 
@@ -27,6 +26,7 @@ from openstack_dashboard.dashboards.admin.routers import forms as rforms
 from openstack_dashboard.dashboards.admin.routers import tables as rtbl
 from openstack_dashboard.dashboards.admin.routers import tabs as rtabs
 from openstack_dashboard.dashboards.project.routers import views as r_views
+from openstack_dashboard.utils import settings as setting_utils
 
 
 class IndexView(r_views.IndexView, n_views.IndexView):
@@ -50,8 +50,9 @@ class IndexView(r_views.IndexView, n_views.IndexView):
             # If admin_filter_first is set and if there are not other filters
             # selected, then search criteria must be provided and return an
             # empty list
-            filter_first = settings.FILTER_DATA_FIRST
-            if filter_first['admin.routers'] and not filters:
+            if (setting_utils.get_dict_config('FILTER_DATA_FIRST',
+                                              'admin.routers') and
+                    not filters):
                 self._needs_filter_first = True
                 return []
             self._needs_filter_first = False
diff --git a/openstack_dashboard/dashboards/admin/volumes/views.py b/openstack_dashboard/dashboards/admin/volumes/views.py
index f9571bd11..c8cb8ae56 100644
--- a/openstack_dashboard/dashboards/admin/volumes/views.py
+++ b/openstack_dashboard/dashboards/admin/volumes/views.py
@@ -16,7 +16,6 @@
 Admin views for managing volumes and snapshots.
 """
 
-from django.conf import settings
 from django.urls import reverse
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
@@ -37,6 +36,7 @@ from openstack_dashboard.dashboards.admin.volumes \
 from openstack_dashboard.dashboards.project.volumes \
     import views as volumes_views
 from openstack_dashboard.utils import futurist_utils
+from openstack_dashboard.utils import settings as setting_utils
 
 
 class VolumesView(tables.PagedTableMixin, volumes_views.VolumeTableMixIn,
@@ -51,12 +51,12 @@ class VolumesView(tables.PagedTableMixin, volumes_views.VolumeTableMixIn,
         default_filters = {'all_tenants': True}
 
         filters = self.get_filters(default_filters.copy())
-        filter_first = settings.FILTER_DATA_FIRST
         volumes = []
 
         self.table.needs_filter_first = False
 
-        if (filter_first['admin.volumes'] and
+        if (setting_utils.get_dict_config('FILTER_DATA_FIRST',
+                                          'admin.volumes') and
                 len(filters) == len(default_filters)):
             self.table.needs_filter_first = True
             return volumes
diff --git a/openstack_dashboard/dashboards/identity/application_credentials/views.py b/openstack_dashboard/dashboards/identity/application_credentials/views.py
index 26a733549..4d175b5f1 100644
--- a/openstack_dashboard/dashboards/identity/application_credentials/views.py
+++ b/openstack_dashboard/dashboards/identity/application_credentials/views.py
@@ -26,6 +26,7 @@ from horizon.utils import memoized
 from horizon import views
 
 from openstack_dashboard import api
+from openstack_dashboard.utils import settings as setting_utils
 
 from openstack_dashboard.dashboards.identity.application_credentials \
     import forms as project_forms
@@ -52,8 +53,9 @@ class IndexView(tables.DataTableView):
         # If filter_first is set and if there are not other filters
         # selected, then search criteria must be provided
         # and return an empty list
-        filter_first = settings.FILTER_DATA_FIRST
-        if filter_first['identity.application_credentials'] and not filters:
+        if (setting_utils.get_dict_config(
+                'FILTER_DATA_FIRST',
+                'identity.application_credentials') and not filters):
             self._needs_filter_first = True
             return app_creds
 
diff --git a/openstack_dashboard/dashboards/identity/domains/urls.py b/openstack_dashboard/dashboards/identity/domains/urls.py
index d536e4a3f..56676a2b0 100644
--- a/openstack_dashboard/dashboards/identity/domains/urls.py
+++ b/openstack_dashboard/dashboards/identity/domains/urls.py
@@ -12,16 +12,16 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
 
 from horizon.browsers import views
 
 from openstack_dashboard.dashboards.identity.domains import views as legacyView
+from openstack_dashboard.utils import settings as setting_utils
 
 
-if settings.ANGULAR_FEATURES.get('domains_panel'):
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'domains_panel'):
     title = _("Domains")
     urlpatterns = [
         url('', views.AngularIndexView.as_view(title=title), name='index'),
diff --git a/openstack_dashboard/dashboards/identity/groups/urls.py b/openstack_dashboard/dashboards/identity/groups/urls.py
index 96b8fe261..45e74e8f2 100644
--- a/openstack_dashboard/dashboards/identity/groups/urls.py
+++ b/openstack_dashboard/dashboards/identity/groups/urls.py
@@ -12,16 +12,16 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import url
 
 from horizon.browsers.views import AngularIndexView
 
 from openstack_dashboard.dashboards.identity.groups import panel
 from openstack_dashboard.dashboards.identity.groups import views
+from openstack_dashboard.utils import settings as setting_utils
 
 
-if settings.ANGULAR_FEATURES.get('groups_panel', False):
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'groups_panel'):
     title = panel.Groups.name
     urlpatterns = [
         url(r'^$', AngularIndexView.as_view(title=title), name='index'),
diff --git a/openstack_dashboard/dashboards/identity/groups/views.py b/openstack_dashboard/dashboards/identity/groups/views.py
index 8eb96d60e..108c94614 100644
--- a/openstack_dashboard/dashboards/identity/groups/views.py
+++ b/openstack_dashboard/dashboards/identity/groups/views.py
@@ -12,7 +12,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.urls import reverse
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
@@ -32,6 +31,7 @@ from openstack_dashboard.dashboards.identity.groups \
 from openstack_dashboard.dashboards.identity.groups \
     import tables as project_tables
 from openstack_dashboard.utils import identity
+from openstack_dashboard.utils import settings as setting_utils
 
 
 class IndexView(tables.DataTableView):
@@ -53,8 +53,8 @@ class IndexView(tables.DataTableView):
             # If filter_first is set and if there are not other filters
             # selected, then search criteria must be provided and
             # return an empty list
-            filter_first = settings.FILTER_DATA_FIRST
-            if filter_first['identity.groups'] and not filters:
+            if (setting_utils.get_dict_config(
+                    'FILTER_DATA_FIRST', 'identity.groups') and not filters):
                 self._needs_filter_first = True
                 return groups
 
diff --git a/openstack_dashboard/dashboards/identity/projects/views.py b/openstack_dashboard/dashboards/identity/projects/views.py
index c784a814f..25458b83a 100644
--- a/openstack_dashboard/dashboards/identity/projects/views.py
+++ b/openstack_dashboard/dashboards/identity/projects/views.py
@@ -42,6 +42,7 @@ from openstack_dashboard.dashboards.identity.projects \
 from openstack_dashboard.dashboards.project.overview \
     import views as project_views
 from openstack_dashboard.utils import identity
+from openstack_dashboard.utils import settings as setting_utils
 
 PROJECT_INFO_FIELDS = ("domain_id",
                        "domain_name",
@@ -95,8 +96,8 @@ class IndexView(tables.DataTableView):
             # If filter_first is set and if there are not other filters
             # selected, then search criteria must be provided and
             # return an empty list
-            filter_first = settings.FILTER_DATA_FIRST
-            if filter_first['identity.projects'] and not filters:
+            if (setting_utils.get_dict_config(
+                    'FILTER_DATA_FIRST', 'identity.projects') and not filters):
                 self._needs_filter_first = True
                 self._more = False
                 return tenants
diff --git a/openstack_dashboard/dashboards/identity/roles/urls.py b/openstack_dashboard/dashboards/identity/roles/urls.py
index f7a4451f2..d440a945e 100644
--- a/openstack_dashboard/dashboards/identity/roles/urls.py
+++ b/openstack_dashboard/dashboards/identity/roles/urls.py
@@ -12,15 +12,15 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
 
 from horizon.browsers.views import AngularIndexView
 
 from openstack_dashboard.dashboards.identity.roles import views
+from openstack_dashboard.utils import settings as setting_utils
 
-if settings.ANGULAR_FEATURES.get('roles_panel', False):
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'roles_panel'):
     # New angular panel
     title = _('Roles')
     urlpatterns = [
diff --git a/openstack_dashboard/dashboards/identity/roles/views.py b/openstack_dashboard/dashboards/identity/roles/views.py
index b2335b406..4a3ac5684 100644
--- a/openstack_dashboard/dashboards/identity/roles/views.py
+++ b/openstack_dashboard/dashboards/identity/roles/views.py
@@ -12,7 +12,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.urls import reverse
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
@@ -25,6 +24,7 @@ from horizon.utils import memoized
 
 from openstack_dashboard import api
 from openstack_dashboard import policy
+from openstack_dashboard.utils import settings as setting_utils
 
 from openstack_dashboard.dashboards.identity.roles \
     import forms as project_forms
@@ -51,8 +51,8 @@ class IndexView(tables.DataTableView):
             # If filter_first is set and if there are not other filters
             # selected, then search criteria must be provided
             # and return an empty list
-            filter_first = settings.FILTER_DATA_FIRST
-            if filter_first['identity.roles'] and not filters:
+            if (setting_utils.get_dict_config(
+                    'FILTER_DATA_FIRST', 'identity.roles') and not filters):
                 self._needs_filter_first = True
                 return roles
 
diff --git a/openstack_dashboard/dashboards/identity/users/urls.py b/openstack_dashboard/dashboards/identity/users/urls.py
index 1c305cc64..724b16b3c 100644
--- a/openstack_dashboard/dashboards/identity/users/urls.py
+++ b/openstack_dashboard/dashboards/identity/users/urls.py
@@ -16,16 +16,15 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-
-from django.conf import settings
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
 
 from horizon.browsers.views import AngularIndexView
 from openstack_dashboard.dashboards.identity.users import views
+from openstack_dashboard.utils import settings as setting_utils
 
 
-if settings.ANGULAR_FEATURES.get('users_panel', False):
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'users_panel'):
     title = _("Users")
     # new angular panel
     urlpatterns = [
diff --git a/openstack_dashboard/dashboards/identity/users/views.py b/openstack_dashboard/dashboards/identity/users/views.py
index b4cccc4e4..3d1b808ba 100644
--- a/openstack_dashboard/dashboards/identity/users/views.py
+++ b/openstack_dashboard/dashboards/identity/users/views.py
@@ -43,6 +43,7 @@ from openstack_dashboard.dashboards.identity.users \
 from openstack_dashboard.dashboards.identity.users \
     import tabs as user_tabs
 from openstack_dashboard.utils import identity
+from openstack_dashboard.utils import settings as setting_utils
 
 LOG = logging.getLogger(__name__)
 
@@ -67,8 +68,8 @@ class IndexView(tables.DataTableView):
             # If filter_first is set and if there are not other filters
             # selected, then search criteria must be provided
             # and return an empty list
-            filter_first = settings.FILTER_DATA_FIRST
-            if filter_first['identity.users'] and not filters:
+            if (setting_utils.get_dict_config(
+                    'FILTER_DATA_FIRST', 'identity.users') and not filters):
                 self._needs_filter_first = True
                 return users
 
diff --git a/openstack_dashboard/dashboards/project/floating_ips/panel.py b/openstack_dashboard/dashboards/project/floating_ips/panel.py
index 267532caa..9af9abc1b 100644
--- a/openstack_dashboard/dashboards/project/floating_ips/panel.py
+++ b/openstack_dashboard/dashboards/project/floating_ips/panel.py
@@ -12,11 +12,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
 
+from openstack_dashboard.utils import settings as setting_utils
+
 
 class FloatingIps(horizon.Panel):
     name = _("Floating IPs")
@@ -25,5 +26,5 @@ class FloatingIps(horizon.Panel):
 
     @staticmethod
     def can_register():
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
-        return network_config['enable_router']
+        return setting_utils.get_dict_config(
+            'OPENSTACK_NEUTRON_NETWORK', 'enable_router')
diff --git a/openstack_dashboard/dashboards/project/images/images/urls.py b/openstack_dashboard/dashboards/project/images/images/urls.py
index b82efeed9..f79f7f4f5 100644
--- a/openstack_dashboard/dashboards/project/images/images/urls.py
+++ b/openstack_dashboard/dashboards/project/images/images/urls.py
@@ -16,15 +16,15 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
 
 from horizon.browsers.views import AngularIndexView
 from openstack_dashboard.dashboards.project.images.images import views
+from openstack_dashboard.utils import settings as setting_utils
 
 
-if settings.ANGULAR_FEATURES['images_panel']:
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'images_panel'):
     title = _("Images")
     urlpatterns = [
         url(r'^(?P<image_id>[^/]+)/$', AngularIndexView.as_view(title=title),
diff --git a/openstack_dashboard/dashboards/project/images/urls.py b/openstack_dashboard/dashboards/project/images/urls.py
index e4d25f2b9..fc24b9048 100644
--- a/openstack_dashboard/dashboards/project/images/urls.py
+++ b/openstack_dashboard/dashboards/project/images/urls.py
@@ -16,7 +16,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import include
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
@@ -27,9 +26,10 @@ from openstack_dashboard.dashboards.project.images.images \
 from openstack_dashboard.dashboards.project.images.snapshots \
     import urls as snapshot_urls
 from openstack_dashboard.dashboards.project.images import views
+from openstack_dashboard.utils import settings as setting_utils
 
 
-if settings.ANGULAR_FEATURES['images_panel']:
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'images_panel'):
     title = _("Images")
     # New angular images
     urlpatterns = [
diff --git a/openstack_dashboard/dashboards/project/instances/views.py b/openstack_dashboard/dashboards/project/instances/views.py
index c8634b154..6e7a76295 100644
--- a/openstack_dashboard/dashboards/project/instances/views.py
+++ b/openstack_dashboard/dashboards/project/instances/views.py
@@ -40,6 +40,7 @@ from horizon import workflows
 
 from openstack_dashboard import api
 from openstack_dashboard.utils import filters
+from openstack_dashboard.utils import settings as setting_utils
 
 from openstack_dashboard.dashboards.project.instances \
     import console as project_console
@@ -266,8 +267,8 @@ class LaunchInstanceView(workflows.WorkflowView):
         initial = super(LaunchInstanceView, self).get_initial()
         initial['project_id'] = self.request.user.tenant_id
         initial['user_id'] = self.request.user.id
-        defaults = settings.LAUNCH_INSTANCE_DEFAULTS
-        initial['config_drive'] = defaults['config_drive']
+        initial['config_drive'] = setting_utils.get_dict_config(
+            'LAUNCH_INSTANCE_DEFAULTS', 'config_drive')
         return initial
 
 
diff --git a/openstack_dashboard/dashboards/project/key_pairs/urls.py b/openstack_dashboard/dashboards/project/key_pairs/urls.py
index c13e40d1e..81fd4378d 100644
--- a/openstack_dashboard/dashboards/project/key_pairs/urls.py
+++ b/openstack_dashboard/dashboards/project/key_pairs/urls.py
@@ -16,15 +16,15 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.conf.urls import url
 from django.utils.translation import ugettext_lazy as _
 
 from horizon.browsers import views
 from openstack_dashboard.dashboards.project.key_pairs import views as \
     legacy_views
+from openstack_dashboard.utils import settings as setting_utils
 
-if settings.ANGULAR_FEATURES.get('key_pairs_panel'):
+if setting_utils.get_dict_config('ANGULAR_FEATURES', 'key_pairs_panel'):
     title = _("Key Pairs")
     urlpatterns = [
         url('', views.AngularIndexView.as_view(title=title), name='index'),
diff --git a/openstack_dashboard/dashboards/project/network_topology/utils.py b/openstack_dashboard/dashboards/project/network_topology/utils.py
index e9ae6a4f8..784828ee0 100644
--- a/openstack_dashboard/dashboards/project/network_topology/utils.py
+++ b/openstack_dashboard/dashboards/project/network_topology/utils.py
@@ -15,6 +15,7 @@ from django.conf import settings
 from openstack_dashboard.api import base
 from openstack_dashboard import policy
 from openstack_dashboard.usage import quotas
+from openstack_dashboard.utils import settings as setting_utils
 
 
 def _quota_exceeded(request, quota):
@@ -28,8 +29,6 @@ def get_context(request, context=None):
     if context is None:
         context = {}
 
-    network_config = settings.OPENSTACK_NEUTRON_NETWORK
-
     context['launch_instance_allowed'] = policy.check(
         (("compute", "os_compute_api:servers:create"),), request)
     context['instance_quota_exceeded'] = _quota_exceeded(request, 'instances')
@@ -37,7 +36,8 @@ def get_context(request, context=None):
         (("network", "create_network"),), request)
     context['network_quota_exceeded'] = _quota_exceeded(request, 'network')
     context['create_router_allowed'] = (
-        network_config['enable_router'] and
+        setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                      'enable_router') and
         policy.check((("network", "create_router"),), request))
     context['router_quota_exceeded'] = _quota_exceeded(request, 'router')
     context['console_type'] = settings.CONSOLE_TYPE
diff --git a/openstack_dashboard/dashboards/project/network_topology/views.py b/openstack_dashboard/dashboards/project/network_topology/views.py
index 53c9224e2..87006ffe2 100644
--- a/openstack_dashboard/dashboards/project/network_topology/views.py
+++ b/openstack_dashboard/dashboards/project/network_topology/views.py
@@ -76,6 +76,7 @@ from openstack_dashboard.dashboards.project.routers.tables import \
 from openstack_dashboard.dashboards.project.routers import\
     views as r_views
 from openstack_dashboard import policy
+from openstack_dashboard.utils import settings as setting_utils
 
 # List of known server statuses that wont connect to the console
 console_invalid_status = {
@@ -214,8 +215,8 @@ class JSONView(View):
 
     @property
     def is_router_enabled(self):
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
-        return network_config['enable_router']
+        return setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                             'enable_router')
 
     def add_resource_url(self, view, resources):
         tenant_id = self.request.user.tenant_id
diff --git a/openstack_dashboard/dashboards/project/networks/ports/workflows.py b/openstack_dashboard/dashboards/project/networks/ports/workflows.py
index 32dcc12aa..fe9175d44 100644
--- a/openstack_dashboard/dashboards/project/networks/ports/workflows.py
+++ b/openstack_dashboard/dashboards/project/networks/ports/workflows.py
@@ -15,7 +15,6 @@
 
 import logging
 
-from django.conf import settings
 from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
 
@@ -26,6 +25,7 @@ from horizon import workflows
 from openstack_dashboard import api
 from openstack_dashboard.dashboards.project.networks.ports import sg_base
 from openstack_dashboard.utils import filters
+from openstack_dashboard.utils import settings as setting_utils
 
 
 LOG = logging.getLogger(__name__)
@@ -160,8 +160,8 @@ class CreatePortInfoAction(workflows.Action):
         return is_supproted
 
     def _populate_vnic_type_choices(self, request):
-        neutron_settings = settings.OPENSTACK_NEUTRON_NETWORK
-        supported_vnic_types = neutron_settings['supported_vnic_types']
+        supported_vnic_types = setting_utils.get_dict_config(
+            'OPENSTACK_NEUTRON_NETWORK', 'supported_vnic_types')
         # When a list of VNIC types is empty, hide the corresponding field.
         if not supported_vnic_types:
             del self.fields['binding__vnic_type']
@@ -314,8 +314,8 @@ class UpdatePortInfoAction(workflows.Action):
         super(UpdatePortInfoAction, self).__init__(request, *args, **kwargs)
         try:
             if api.neutron.is_extension_supported(request, 'binding'):
-                neutron_settings = settings.OPENSTACK_NEUTRON_NETWORK
-                supported_vnic_types = neutron_settings['supported_vnic_types']
+                supported_vnic_types = setting_utils.get_dict_config(
+                    'OPENSTACK_NEUTRON_NETWORK', 'supported_vnic_types')
                 if supported_vnic_types:
                     if supported_vnic_types == ['*']:
                         vnic_type_choices = api.neutron.VNIC_TYPES
diff --git a/openstack_dashboard/dashboards/project/networks/views.py b/openstack_dashboard/dashboards/project/networks/views.py
index 1daad9de8..d75c75b2b 100644
--- a/openstack_dashboard/dashboards/project/networks/views.py
+++ b/openstack_dashboard/dashboards/project/networks/views.py
@@ -15,7 +15,6 @@
 """
 Views for managing Neutron Networks.
 """
-from django.conf import settings
 from django.urls import reverse
 from django.urls import reverse_lazy
 from django.utils.translation import ugettext_lazy as _
@@ -29,6 +28,7 @@ from horizon import workflows
 
 from openstack_dashboard import api
 from openstack_dashboard.utils import filters
+from openstack_dashboard.utils import settings as setting_utils
 
 from openstack_dashboard.dashboards.project.networks \
     import forms as project_forms
@@ -67,9 +67,9 @@ class DefaultSubnetWorkflowMixin(object):
 
     def get_default_dns_servers(self):
         # this returns the default dns servers to be used for new subnets
-        dns_default = "\n".join(
-            settings.OPENSTACK_NEUTRON_NETWORK['default_dns_nameservers'])
-        return dns_default
+        default_dns_nameservers = setting_utils.get_dict_config(
+            'OPENSTACK_NEUTRON_NETWORK', 'default_dns_nameservers')
+        return "\n".join(default_dns_nameservers)
 
 
 class CreateView(DefaultSubnetWorkflowMixin, workflows.WorkflowView):
diff --git a/openstack_dashboard/dashboards/project/networks/workflows.py b/openstack_dashboard/dashboards/project/networks/workflows.py
index ed365fef8..60207fadc 100644
--- a/openstack_dashboard/dashboards/project/networks/workflows.py
+++ b/openstack_dashboard/dashboards/project/networks/workflows.py
@@ -28,6 +28,7 @@ from horizon import workflows
 from openstack_dashboard import api
 from openstack_dashboard.dashboards.project.networks.subnets import utils
 from openstack_dashboard import policy
+from openstack_dashboard.utils import settings as setting_utils
 
 
 LOG = logging.getLogger(__name__)
@@ -205,7 +206,8 @@ class CreateSubnetInfoAction(workflows.Action):
     def __init__(self, request, context, *args, **kwargs):
         super(CreateSubnetInfoAction, self).__init__(request, context, *args,
                                                      **kwargs)
-        if not settings.OPENSTACK_NEUTRON_NETWORK['enable_ipv6']:
+        if not setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                             'enable_ipv6'):
             self.fields['ip_version'].widget = forms.HiddenInput()
             self.fields['ip_version'].initial = 4
 
@@ -380,7 +382,8 @@ class CreateSubnetDetailAction(workflows.Action):
     def __init__(self, request, context, *args, **kwargs):
         super(CreateSubnetDetailAction, self).__init__(request, context,
                                                        *args, **kwargs)
-        if not settings.OPENSTACK_NEUTRON_NETWORK['enable_ipv6']:
+        if not setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                             'enable_ipv6'):
             self.fields['ipv6_modes'].widget = forms.HiddenInput()
 
     def populate_ipv6_modes_choices(self, request, context):
diff --git a/openstack_dashboard/dashboards/project/routers/panel.py b/openstack_dashboard/dashboards/project/routers/panel.py
index d41558aee..290f1913c 100644
--- a/openstack_dashboard/dashboards/project/routers/panel.py
+++ b/openstack_dashboard/dashboards/project/routers/panel.py
@@ -12,11 +12,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from django.conf import settings
 from django.utils.translation import ugettext_lazy as _
 
 import horizon
 
+from openstack_dashboard.utils import settings as setting_utils
+
 
 class Routers(horizon.Panel):
     name = _("Routers")
@@ -25,5 +26,5 @@ class Routers(horizon.Panel):
 
     @staticmethod
     def can_register():
-        network_config = settings.OPENSTACK_NEUTRON_NETWORK
-        return network_config['enable_router']
+        return setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                             'enable_router')
diff --git a/openstack_dashboard/dashboards/project/security_groups/forms.py b/openstack_dashboard/dashboards/project/security_groups/forms.py
index 2e77da46d..1441a1297 100644
--- a/openstack_dashboard/dashboards/project/security_groups/forms.py
+++ b/openstack_dashboard/dashboards/project/security_groups/forms.py
@@ -32,6 +32,7 @@ from horizon.utils import validators as utils_validators
 
 from openstack_dashboard import api
 from openstack_dashboard.utils import filters
+from openstack_dashboard.utils import settings as setting_utils
 
 
 class GroupBase(forms.SelfHandlingForm):
@@ -296,7 +297,8 @@ class AddRule(forms.SelfHandlingForm):
             ('all', _('All ports')),
         ]
 
-        if not settings.OPENSTACK_NEUTRON_NETWORK['enable_ipv6']:
+        if not setting_utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                             'enable_ipv6'):
             self.fields['cidr'].version = forms.IPv4
             self.fields['ethertype'].widget = forms.TextInput(
                 attrs={'readonly': 'readonly'})
diff --git a/openstack_dashboard/test/unit/utils/test_settings.py b/openstack_dashboard/test/unit/utils/test_settings.py
new file mode 100644
index 000000000..a3e450ebe
--- /dev/null
+++ b/openstack_dashboard/test/unit/utils/test_settings.py
@@ -0,0 +1,39 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from django.test import utils as test_utils
+
+from openstack_dashboard.test import helpers as test
+from openstack_dashboard.utils import settings as utils
+
+
+class SettingsTests(test.TestCase):
+    def test_get_dict_config_default_value(self):
+        self.assertEqual(
+            True,
+            utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                  'enable_router'))
+
+    @test_utils.override_settings(OPENSTACK_NEUTRON_NETWORK={
+        'enable_router': False})
+    def test_get_dict_config_configured_value(self):
+        self.assertEqual(
+            False,
+            utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                  'enable_router'))
+
+    @test_utils.override_settings(OPENSTACK_NEUTRON_NETWORK={})
+    def test_get_dict_config_missing_key(self):
+        self.assertEqual(
+            True,
+            utils.get_dict_config('OPENSTACK_NEUTRON_NETWORK',
+                                  'enable_router'))
diff --git a/openstack_dashboard/utils/settings.py b/openstack_dashboard/utils/settings.py
index 61c92de76..afe771a12 100644
--- a/openstack_dashboard/utils/settings.py
+++ b/openstack_dashboard/utils/settings.py
@@ -21,9 +21,34 @@ from django.conf import settings
 
 from horizon.utils import file_discovery
 from horizon.utils import functions as utils
+from openstack_dashboard import defaults
 from openstack_dashboard import theme_settings
 
 
+def get_dict_config(name, key):
+    """Get a config value from a dict-type setting.
+
+    If a specified key does not exist in a requested setting,
+    the default value defined in openstack_dashboard.defaults
+    is considered.
+
+    .. warning::
+
+       This function should not be used from horizon plugins
+       as it only checks openstack_dashboard.defaults
+       when accessing default values.
+
+    :param name: Name of a dict-type setting
+    :param key: Key name of the dict-type setting
+    :raises KeyError: Raised if no default value is found for a requested key.
+        (This can happen only for horizon plugin codes.)
+    """
+    config = getattr(settings, name)
+    if key in config:
+        return config[key]
+    return getattr(defaults, name)[key]
+
+
 def import_submodules(module):
     """Import all submodules and make them available in a dict."""
     submodules = {}